ctg2 2x - 6 ctg 2x + 5 = 0 - №19420259

ctg2 2x - 6 ctg 2x + 5 = 0
- Предмет:
  Математика
- Автор:
  oscar89
- 6 лет назад

Ответы 1

ctg22x – 6ctg2x +5=0

Обозначим ctg2x=у

у2-6у+5=0

Д=36-20=16

У=5

У=1

                     ctg2x=5, ctg2x=1

                                    х=0,5arcctg5+0,5Пп

                     х=arcctg1+Пn=П/8+0,5п
- Автор:
  cyrusyqal
- 2 года назад
- 4
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